Crossword Genius

Maybe second-rate celeb in bubble (7)

Ross

I believe the answer is:

blister

(Other definitions for blister that I've seen before include "Friction bubble on skin" , "Bristle (anag.)" , "Result of friction" , "Bubble raised on the skin" , "Bubble-like swelling on skin" .)

I've seen this clue in The Sun.
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